1975) are prey species of C. nigritulus LeConte. Pycnocephalus argentinus Brethes is a

predator of Ceroplastes sp. (Brethes 1922, Parker 1951) in South America.

 To date, no cybocephalid species have been described from the West Indies. Due

to the collecting techniques required to obtain these beetles and their very small size,

these beetles are often overlooked and are rarely found in collections. Cybocephalids do

not come to light traps and are usually collected by beating vegetation, extracted from

leaf litter samples, or from flight intercept traps. With collectors using collecting

techniques such as sifting sand and leaf litter as well as the increased use of flight

intercept traps in the West Indies, more of these beetles will be collected and

subsequently described.

 The objectives of this study are to 1) present a key for the identification of the

cybocephalids of the West Indies and Trinidad, 2) describe new West Indian species, and

3) record the distribution of each species in the Caribbean Basin.

 Materials and Methods

Materials

 For this study, 222 specimens belonging to the genus Cybocephalus and 31

specimens belonging to the genus Pycnocephalus were examined. One female specimen

from the Dominican Republic is at hand, but without associated males their identification

cannot be ascertained. Specimens were borrowed from the following institutions and

private collections (name of the curator or owner in parentheses):

AAIC Albert Allen Insect Collection, Boise, ID (Albert Allen)

BMNH Natural History Museum, London [formerly British Museum (Natural History)],
 UK (Maxwell Barclay)

FMNH Field Museum of Natural History, Chicago, IL (James H. Boone)